A new report has claimed Apple is still trying to combine apps.

We've heard this before, but now, Bloomberg is throwing its hat in the ring, claiming Apple is planning to combine apps made for iPhone, iPad, and Mac by 2021. Apple will reportedly allow developers to create a single app, or a single binary, that will work across iOS and MacOS. Apple already hinted at this effort at WWDC 2018. And it has has started launching versions of Home, Stocks, News, and Voice Memo for MacOS.

But a combined universal app a whole different beast. Bloomberg is therefore suggesting that Apple wants to gradually tackle this monumental task. App developers will be allowed to port their iPad apps to the Mac this year with an incoming SDK, and then this will continue to iPhone apps in 2020, so those apps can be brought to macOS. This SDK, which has yet to be unveiled, is supposed to appear at this year’s WWDC.

Apple's vision reminds us of Microsoft’s Universal Windows Platform. Microsoft has been pushing developers to make a single universal app for Windows phones, tablets, and PCs. Microsoft is even going for a single operating system, but Apple wants to keep iOS and macOS distinct.

Apple hasn’t officially announced any of this yet or even dates for WWDC 2019, but the latest reports indicate it'll kick off 3 June.